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12. Reiter’s syndrome is the name given to a form of.A. Body odour.B. Stomach disorder.C. Infectious arthritis.D. Gout.

13. Which of these is not a type of soil?A. Sand.B. loam.C. Granite.D. clay.

14. Skeletal structures of terrestrial animals are more elaborate than those of aquatic vertebrates because.A. Air is more mobile than water.B. Water contains more nutrients than air.C. Movement is much easier in air than on water.D. Density of water is greater than that of air.

15. In trying to find out the order in which organisms appear on a cleared plot,you are studying.A. ecosystem.B. food chain.C. succession.D. food web.

UNN POST UTME Past Answers for Medicine and Surgery

BIOLOGY (2012/13)

1. The synapse is a junction between two nerve cells, consisting of a minute gap across which impulses pass by diffusion of a neurotransmitter. Ans. B

2. The ovary is the enlarged bottom part of the pistil. It contains one or more ovoid structures called ovule. Each ovule houses a female gamete. After fertilization, the ovary develops into a fruit, while the ovules develop into seeds which contain the embryo Ans. B

3. When plants and animals die, they become food for decomposers like bacteria, fungi and earthworms. Decomposers (or saprotrophs) recycle dead plants and animals into chemical nutrients like carbon and nitrogen that are release back into the soil, air and water. Ans. D

4. Plants are composed of cells that are enclosed in rigid cell walls made of cellulose, a substance found only in plants. Ans. B

5. The end products of the digestion of fats and oils in mammals are fatty acids and glycerol. Ans. D

6. Note that the chloroplast contains the chlorophyll, which absorbs light energy from sunlight. This energy is used for the splitting or photolysis of water to give hydrogen (H) components and hydroxide (OH) components.

4H20 -► 4H + 40H

The OH components undergo further reaction to produce water and oxygen while the H component merely reduces the carbon dioxide to form sugar.

7. Note that respiration is the process by which cells break down sugar. Within a cell, two types of respiration may occur: “aerobic” and “anaerobic”. Aerobic respiration is the more productive of the two and requires the presence of oxygen. Without oxygen, anaerobic respiration, which is also known as “fermentation, “occurs. The waste product of anaerobic respiration is lactic acid (in animals). In plants, ethanol is the waste product. Ans. D

8. The mushroom is an organism that feeds saprophvticallv, i.e obtains its food from non-living organic matter thereby causing the decay of the organic matter. Ans. D

9. Mitochondria are seat of respiration Ans. C

10. Mamu River forest reserve is in Anambra State Ans. B

11. In Igboland, Guinea worm is a common health problem in Abakaliki, Ebonyi State